<header>
    <nav>
      <h1>Friendly Travels</h1>
      <div class="auth" *ngIf="user$ | async else signin">
        <a href="/my-travels">My Travels</a>
        <a href="/login" (click)="logout()">Log Out</a>
      </div>
      <ng-template #signin>
        <a href="/signin">Sign In</a>
      </ng-template>
    </nav>
  </header>
